0,0 → 1,97 |
/* |
* AAC encoder |
* Copyright (C) 2008 Konstantin Shishkov |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public |
* License as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
* Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public |
* License along with FFmpeg; if not, write to the Free Software |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
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#ifndef AVCODEC_AACENC_H |
#define AVCODEC_AACENC_H |
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#include "libavutil/float_dsp.h" |
#include "avcodec.h" |
#include "put_bits.h" |
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#include "aac.h" |
#include "audio_frame_queue.h" |
#include "psymodel.h" |
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typedef enum AACCoder { |
AAC_CODER_FAAC = 0, |
AAC_CODER_ANMR, |
AAC_CODER_TWOLOOP, |
AAC_CODER_FAST, |
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AAC_CODER_NB, |
}AACCoder; |
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typedef struct AACEncOptions { |
int stereo_mode; |
int aac_coder; |
} AACEncOptions; |
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struct AACEncContext; |
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typedef struct AACCoefficientsEncoder { |
void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s, |
SingleChannelElement *sce, const float lambda); |
void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce, |
int win, int group_len, const float lambda); |
void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size, |
int scale_idx, int cb, const float lambda); |
void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda); |
} AACCoefficientsEncoder; |
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extern AACCoefficientsEncoder ff_aac_coders[]; |
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/** |
* AAC encoder context |
*/ |
typedef struct AACEncContext { |
AVClass *av_class; |
AACEncOptions options; ///< encoding options |
PutBitContext pb; |
FFTContext mdct1024; ///< long (1024 samples) frame transform context |
FFTContext mdct128; ///< short (128 samples) frame transform context |
AVFloatDSPContext fdsp; |
float *planar_samples[6]; ///< saved preprocessed input |
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int samplerate_index; ///< MPEG-4 samplerate index |
int channels; ///< channel count |
const uint8_t *chan_map; ///< channel configuration map |
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ChannelElement *cpe; ///< channel elements |
FFPsyContext psy; |
struct FFPsyPreprocessContext* psypp; |
AACCoefficientsEncoder *coder; |
int cur_channel; |
int last_frame; |
float lambda; |
AudioFrameQueue afq; |
DECLARE_ALIGNED(16, int, qcoefs)[96]; ///< quantized coefficients |
DECLARE_ALIGNED(32, float, scoefs)[1024]; ///< scaled coefficients |
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struct { |
float *samples; |
} buffer; |
} AACEncContext; |
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extern float ff_aac_pow34sf_tab[428]; |
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void ff_aac_coder_init_mips(AACEncContext *c); |
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#endif /* AVCODEC_AACENC_H */ |